Pump



July 7, 1925.

. K. DAVIS PUMP 2 Sheets-Sheet 1 INVENTQR ATTORNEY July 7, 1925. 1,545,038

K. DAVIS PUMP Filed Aug. 1920 2 Sheets-Sheet 2 III fllllll. Zmnm Illfllllllllll Passed July 7, 1925.

- UNITED STATES 1,545,038 PATENT OFFICE.

KENNETH DAVIS, or en BEnEnIcr, PENNSYLVANIA, nssrenon 'ro ammm PEALE, or maw Yonx, N. Y.

PUMP.

To all whom it may concern:

Be it known that I, KnNNm'H DAVIS, a citizen of the United States, residing at St.-

Benedict, in the county of Gambria and State of Pennsylvania, have made certain new and useful Improvements in Pumps, of which the following is a specification.

The invention relates to pumps, and more especially to the driving mechanism and .valve mechanism thereof.

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom, or may be learned by practice with the invention, the same being realized and attained by means of the instrumentalities and combinations pointed out in the appended claims.

The invention consistsin the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanyingdrawings, referred to herein and constituting a part hereof, illustrate one embodiment of the invention, and together with the description, serve to explain the principles of the invention.

Of the drawin Fig. 1 is a si e elevation of a pumping mechanism embodying the invention, and showing one of the pump cylinders in vertical section;

Fig. 2 is an end elevation, looking at Fig. 1 from the right;

Fig. 3 is in part a top plan and in part a horizontal section taken on the line 3-3 of Fi 1- Fig. 4 is a detail of the piston driving wheel or disc;

Fig. 5 is a fragmentary sectional detail taken on the line 5-5 of Fig. 3;

Fig. 6 is an end elevation, corresponding to Fig. 2, but showing another form of valve mechanism;

Fig. 7 is a fragmentary top plan, corresponding to Fig. 6, but showing the pump cylinders in horizontal section;

Fig. 8 is a fragmentary, enlarged horizontal section of the valve mechanism on line 8-8 of Fig. 9; and

Fi 9 is a diagrammatic elevation, showing t e two pump cylinders opened out from each other angularly, and the valves also diagrammatically, the view being made in this manner for the sake of greater clearness in the showing.

Referring now in detail to the embodiment of the invention illustrated by way of example in the accompanyin drawings, a reciprocating pum is shown riven by a rotary motor throug rotary connections, embodylng speed reducing gearing, and preferably an electrical motor is employed.

In such embodied form, an electrical motor is shown having a speed reducing gearing mounted on the shaft 2 thereof. As embodied, the speed reducing gearing comprises an eccentric 3, mounted on the shaft 2, and fixed to rotate therewith by a key 4. Mounted loosely upon the eccentric 3 1s a cyllndrical bushing 5, and mounted loosely on the bushing 5 is a geared, pinion 6, a shoulder 7 on the eccentric serving to hold the pinion and sleeve against longitudinal displacement. The geared pinion 6- is in mesh with an internally geared ring 8, which ring is supported in a part 10 of the machine frame and is held from rotation by suitable means, such as ke s 9.

Loosely mounted on t e sleeve 5 is a geared pinion 13, with its side face in engagement with the pinion 6, the two pinions being fastened together by suitable means,-such as rivets or pins 14:, so that they will rotate together.

Mounted on the machine frame (Fi 3) is a stub shaft 15 held in position in its earing 16 by a nut 17', screw threaded upon the back end of the shaft. Sleeved on the shaft 15 is a bushing 18, and journaled on the bushing 18 is a rotary piston actuating member 19, which in the present embodiment is in the form of a sinuous wheel or disc.

To drive the piston actuating member 19, there is provided, extending outwardly from said member a cylindrical portion 20, pro vided at its outen end with an internal gear ring 21, with which gear ring meshes the geared pinion 13 already described. The disc 19 and its shaft 16 in this construction are in alignment and concentric with the motor shaft 2.

The operation of the hereinbefore described gearing for imparting rotary motion at greatly reduced speed to the disc 19 from the motor shaft 2, is substantially as follows By reason of the eccentric mounting of the geared pinion 6 upon the shaft 2, it

passes circumferentially about and comes consecutively into engagement with the internal gear teeth of the rin 8. -The ring 8, it Wll be recalled, is in xed non-rotating position on the frame, and as a result the pinion 6 will have a backward movement of rotation about its own axis relatively to the rotation of motor shaft 2 equal to the distance of the dlflerence of the number of teeth between the p1n1on6 and the gear ring 8 for each rotation of the shaft 2. The pinion 13, being fixed to the pinion 6will rotate therewith, and pass c1rcumferentially aboutthe internal gear 21, and its teethwill mesh consecutively with the gearedteeth of the internal gear ring 21, which is fixed to the piston driving disc 19. This will impart rotary motion to the disc 19 in an opposite direction equal in distance to the difference in the number of teeth on the pinion 13 and the internal gear ring 21. Thus it will be seen that a greatl reduced rotary movement is 1mparte to the disc 19 through the double gear reduction as described.

As embodied, the pump is shown having two double acting cylinders 26 and 27, provided, respectively, with reciprocating pistons 28 and 29, having piston rods 30 and 31. As embodied, the piston rods are driven from the rotary member 19, and preferably by direct en agement with the edge thereof, thereby ma ing a very simple mechanism. The embodied connections for each piston rod to the driving means comprises a head 32 recessed to permit the edge of the member 19 to project thereinto. The edge of the disc 19 is preferably formed perpendicular to its axis to rovide an easy running bearing for the plston rod connections. Each of the heads 32 is provided with a pair of friction rollers 33 and 34, which rollers bear against the opposite sides of the disc 19. The heads 32 serve also as guides for the piston rods, running on guideways 36 formed on the machine frame. The piston rods may be provided with packing glands 35 of any suitable or approved form.

In Figs. 1, 2 and 3 of the drawings, the cylinders are shown provided with an ordinary form ofcheck valves both for the intake and for the discharge. An intake or suction pipe 39 branches into pipes 40 and 41; pipe 40 branches into two pipes 42 and 43, provided, respectively, with check valves 46 and 47; and pipe 41 branches into two pipes 44 and 45, provided with similar check valves not shown). The lift or outlets from c lmder 27 is through pipes 48 and 49 whic converge into a pipe 50. The outlets from cylinder 28 is through pipes 51 and 52, whlch converge into a pipe 53. Pipes 50 and 53 conver into a ipe 54, constituting a common ift or out et ipe for the two cylinders. Pipes 48 an 49 mine work, wherein water is pum (1 con-- taining particles of coal or rock, an pumps are run for long periods without supervision. ,With the ordinary-forms of valves, a particle of coal or rock lod ing beneath a valve may destroy the efficiency of the pump, or terminate the pumping action while the pump continues to run, until discovered and removed by an attendant.

In connection therewlth means are preferably provided embodying a common valve mechanism for a plurality of pump cylinders, although a separate valve mechanism mayi be provided for each cylinder, if desire Referring now in detail to Figs. 6 to 9, they show a dirt proof valve system common to the two pum cylinders, and com mon also to'the suction or intake and to the lift or outlets from the two cylinders.

Referring first to the intake system, a common suction or intake pipe 60 for all the intake ports ofthe two cylinders is provided, opening into a common valve chamber 61. From this chamber 61 pipes lead to the suction or inlet orts at each end of eachof the pump cy inders 26 and 27. Of these, pipes 62 and 63 lead, respectively, from the valve chamber to the inlet ports .64 and 65, at the two ends, res actively, of cylinder 26, and ipes 66 an 67 lead from the valve cham r to the inlet ports 68 and 69, at the two ends, respectively, of cylinder 26. Pi 62 and 67 open, respectively, out oi zorts 70 and 71 in the valve chamber 61, and the ports 70 and 71 are located diametrically opposite to each other in the valve chamber. Pi s 63 and 66 open, respectively, out of anot er pair of inlet ports 72 and 73 in the valve chamber 61, which are likewise located diametrically opposite to each other. This mechanism.

provide for the intake of the two doubleacting cylinders.

A single valve, preferably a rotary valve, controls the four ports 70 and 71, and 72 and 73 (thereby controlling the intake at each end of each cylinder), the valve chamber 61 being correspondingly preferably cylindrical.

Referring now to the lift or outlet system, a valve chamber 77 is provided, also cylindrical, and preferably structurally unitary with valve chamber 61, the two chambers being separated by, a partition or head 78.

The two valve chambers are in a common casing 93, and the twovalves are preferably mounted upon and actuated by a common shaft, as will be later described. A common lift or outlet pipe 79 from the valve chamber 77 is likewise referably provided.

From valve chamber 77, pipes lead to the outlet ports at each end of the cylinders 26 and 27, the arrangement being preferably the same as for the inlet system. In detail, pipes 80 and 81 communicate from valve chamber 7 7 to the outlet ports 82 and 83, at the opposite ends, respectively, of the cylinders 26 and 27. The pi es 80 and 81 open into the valve chamber 7 7 by ports 84-. and 85, res ectively, which are positioned diametrica ly opposite each other in the walls of the valve chamber.

The two other cylinder outlet pipes 86 and 87 communicate also from the valve chamber 77 with the outlet ports 89 and 90, respectively, in the two cylinders 26 and 27. The pipes 86 and 87 open into the valve chamber 77 by ports 91 and 92, respectively, which are located diametrically opposite each other in the valve chamber.

A convenient arrangement in plan of the pipes leading into and out of the valve chamber or casing 93, the upper part thereof forming the valve chamber 77 and the lower part thereof forming valve chamber 61, is shown in Fig. 8.

The valves are all the same or similar in construction and operation, and a single description will suffice. A valve 95 is mounted on a shaft 96 for rotary motion within the cylindrical valve casing 93, the shaft 96 being journaled in the heads 97 and 98 of the casing 93.

Valve 95 is provided with a body portion 99 surrounding the shaft 96, and with two projecting-heads 100' and 101, which have arcuate or cylindrically curved ends or faces 102 and 103, adapted to fit closely against and to rotate within the valve cylinder walls, these heads serving to open and to close the ports in the valve chamber walls. The heads 100 and 101 are provided with more or less sharp edges in the parts or ends thereof extending longitudinally of the cylinder, the heads being undercut on their inward faces extending toward the center of the valve cylinder. These edges assist in preventing the lodgment of dirt in the valves.

A brief description of the operation of one of the valves, in connection with Figs. 8 and 9, will suffice for both. The face 102 in its two positions serves alternately to close and to open the outlet ports (or inlet ports, as the case may be) for the opposite ends of either one of the cylinders 26 or 27. The other face 103 in its two positions serves alternately to close and to open the outlet ports or inlet ports, as the case may be) for the other of the two cylinders 26 or 27. Thus the valve 95, and considering the intake system for example, by its rotation and and the intake at the front end of cylinder" On reversing the position of the valve, the reverse conditions obtain as to the opening and closing of the inlet ports. As the pump pistons are moving in opposite directions, the valve operation just described corresponds to the water flow created by the pistons, the water discharging from the opposite ends of the two cylinders on any particular stroke, and changing ends with the reversal of the piston stroke. It will also be understood that when an inlet port at one end of a cylinder is open, the outlet port at that end of the cylinder is closed, these conditions being essential to pump operation and elaborated description thereof is deemed unnecessary.

The foregoing description will fit equally the outlet stood as applying thereto without repetition. The showing of the valves in Fig. 9 1s purely diagrammatic, the-actual mecha nism being shown in Fig; 8, the four outlet pipes preferably entering the valve chamber in one horizontal plane in valve chamber 77, and the four inlet pipes being similarly arranged in valve chamber 61. The position of all the ports and valves is best shown simultaneously, however, by the diagrammatic arrangement of Fig. 9.

valve system and will be under- In the embodied form, the valves are positively actuated, and this is preferably effected by rotary mechanism operated from the motor. In such embodied form, the shaft 15 extends from bearing 16 on the opposite side from the piston driving disc 19.

Fixed on shaft 15 is a cylindrical cam 108 having an operating groove 109 formed therein. Working in groove 109 is a cam roller 110, which is mounted on a crank arm 111, which arm is fixed to the valve shaft 96, already described.

The cam groove 109 is shaped to give the required and properly timed movements and dwells of the valves 95, as indicated by Figs. 8 and 9. The valve movement provided is quick and simple, having little mechanism (two valves serving for the eight ports of the two cylinders), and is positively driven from the driving shaft for the pump pistons. The valves are dirt proof, as particles of coal or rock lodging in any of the valve ports will be dislodged at once by the swinging, sharp edges of the heads 100 and 101. The valve cylinder heads 97 and 98 can be removed to clean the valve chambers.

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departures may be made therefrom within the scope of the accompanying claims without departing from the principles of the inventlon and without sacrificing its chief advantages.

What I claim is 1. A pump including in combination a rotary motor, gearing on the motor shaft, a

fixed 7 internal gear meshing therewith, a sinuous rotary member having an internal gear likewise meshing with the gearing on the motor shaft, 9. pump cylinder having a piston and a piston ro having a head engaging the rim' of the sinuous rotary member to reciprocatethe piston.

2. A pump including in combination a rotary motor, gearing eccentrically mountedon the motor shaft, a fixed internal gear meshing therewith, a sinuous rotary member having an internal gear likewise meshing with the gearing on the motor shaft, a pump cylinder having a piston and a piston rod having a head engaging the rim of the sinuous rotary member to reciprocate the piston.

.3. A pump including in combination aretary motor, an eccentric fixed to the motor shaft, caring loosely mounted on the eccentric, a fixed internal gear meshing therewith, a sinuous rotary member having an internal gear likewise meshing with the gearing on the motor shaft, a pum cylinder having a piston and a piston ro having a head engaging the rim of the sinuous rotary memher to reciprocate the piston.

4. A pump including in combination a rotary motor, gearing on the motor shaft, a fixed internal ear meshing therewith, a rotary member aving an internal gear meshlng therewith, a pump cylinder having a piston and piston rod and connections for reciprocating the piston rod from the geared rotary member.

5. A pump including in combination a rotary motor, gearing eccentrically mounted on the motor shaft, a fixed internal gear meshing therewith, a rotary member hav-* ing an internal gear meshing therewith, a pump cylinder having a piston and piston rod and connections for reciprocating the piston rod from the geared rotary member.

6. A pump including in 1 combination a rotary motor, gearing on the motor "shaft, 9. fixed internal gear meshing therewith, a rotary member having an internal gear likewis meshing with the gearing on the motor shaft, a pump cylinder having a piston and piston rod operated from said rotary memer and valve gearing operated by said rotary geared member.

7. A pump including in combination a rotary motor, gearing on the motor shaft, a fixed internal gear meshing therewith, a rotary member concentric with the motor and having an internal gear likewise meshing with the gearing on the motor shaft, 9. pump cylinder havin a piston and piston rod operated from sai rota member and valve gearing operated by sai rotary geared member. a

8 A pump including in combination a rotary motor, caring on the motor shaft, a fixed interns. gear meshing therewith, a rotary member having an internal gear likewise meshing with the gearing on the motor shaft, apump cylinder having a piston and p1ston rod operated from said rotar member, a second rotary member rotatin with said geared rota member and va ve gearing 0 rated ther e by.

9. A pump inclu ing in combination a rotary motor, caring on the motor shaft, a fixed interna gear meshing therewith, a rotary member concentric with the motor and havin an internal gear likewise meshing with t e gearing on the motor shaft, a pump cylinder having a piston and iston rod operated from said rotary mem r, a second rotar member concentric and rotatin with said geared rotary member and va ve gearing operated thereby.

10. A pump lncluding in combination a rotary motor, gearing on'the motor shaft, reduction gearing in mesh therewith including a rotary member both of the said gearings bearing. rotatable on parallel axes, a cylinder having a piston and piston rod driven from said rotary member, and valve gearing including a rotating cam also driven from said rota member.

11. A pump including in combination a rotary motor, gearing on the motor shaft, reduction gearing in mesh therewith including a rotary member concentric with the motor shaft, a cylinder havin a piston and piston rod driven from sai rotary member, and an oscillating valve also driven from said rota member.

12. A pump including in combination a rotary motor, gearing on the motor shaft, reduction gearing in mesh therewith including a rotary member concentric with the motor shaft, a cylinder having a piston and piston rod driven from said rota member, a second concentric rotary mem r and valve gearing driven thereby.

13. A pump including in combination a rotary drivin shaft, cylinders parallel to the shaft, dou le-acting pistons in the cylinders, means operatively connecting the pistons to said shaft, valve means, and a cam rotatable with said shaft -for operating the valve means.

14. A pump including in combination a rotary drivin shaft, a cylinderi parallel thereto, a dou le acting piston in the cylinder, means operatively connecting the piston and the driving shaft, an oscillating valve, and a cam, mounted on the driving gearing being substantially parallel to said shaft and rotatable therewith, for operating the oscillating valve.

15. A pump comprising in combination a rotary driving shaft, a plurality of cylinders parallel thereto, double-acting pistons in the cylinders, an 1 oscillating valve shaft, inlet and outlet controlling valves mounted on the oscillating shaft, and means for driving the pistons and the, valve shaft from the driving shaft.

16. A pump including in combination a rotary driving shaft, a rotary member, double reduction gearing cooperating with the driving shaft and with the rotary member, the axes of the elements of the said gearing being substantially parallel to said driving shaft, and a pump piston driven by said rotary member.

17. A pump including in combination a rotary driving shaft, a rotary member, double reduction gearing cooperating with the driving shaft and with the rotary member, the axes of the elements of the said gearing being substantially parallel to said driv ing shaft, a pum piston driven by said rotary member, an valve gearing driven by said rotary member. i

18. A pump including in combination a rotary driving shaft, a rotary member, double reduction gearing cooperating with the .driving shaft and with the rotary member, the axes of the elements of the said driving shaft, a plurality of double-acting pistons actuated by the rotary member, and

valve gearing cooperating with the several- IEpistons and driven from said rotary mem- 19. A pump comprising in combination a plurality of parallel cylinders, a double acting piston in each cylinder, an electric driving motor having its shaft parallel to the axes of the cylinders, means including reduction gearing, operatively connecting the motor shaft to the several pistons, and valve means also driven through said reduction gearing operatively connected to both ends of the several cylinders.

20. A pump comprising in combination a plurality of parallel cylinders, a double-acting piston in each cylinder, an electric driving motor having its shaft parallel to the axes of the cylinders and equidistant therefrom, means, including reduction gearing, operatively connecting the motor shaft to the several istons, and oscillating valve means also riven through said reduction gearing operatively connected to both ends of the several cylinders.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

'- KENNETH DAVIS.

Witnesses:

B. F. Bowers, CHAS. P. BRINTON. 

